Date.prototype.isLeapYear = function() {
	return (0 == this.getYear() % 4 && ((this.getYear() % 100 != 0) || (this.getYear() % 400 == 0)));
}

Date.prototype.Format = function(formatStr) {
	var str = formatStr;
	var Week = ['日', '一', '二', '三', '四', '五', '六'];
	str = str.replace(/yyyy|YYYY/, this.getFullYear());
	str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() %
		100));
	str = str.replace(/MM/, this.getMonth() > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));
	str = str.replace(/M/g, this.getMonth() + 1);
	str = str.replace(/w|W/g, Week[this.getDay()]);
	str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
	str = str.replace(/d|D/g, this.getDate());

	str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
	str = str.replace(/h|H/g, this.getHours());
	str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
	str = str.replace(/m/g, this.getMinutes());

	str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
	str = str.replace(/s|S/g, this.getSeconds());

	return str;
}

//---------------------------------------------------  
// 日期格式化  
// 格式 YYYY/yyyy/YY/yy 表示年份  
// MM/M 月份  
// W/w 星期  
// dd/DD/d/D 日期  
// hh/HH/h/H 时间  
// mm/m 分钟  
// ss/SS/s/S 秒  
//---------------------------------------------------  


//+---------------------------------------------------  
//| 求两个时间的天数差 日期格式为 YYYY-MM-dd   
//+---------------------------------------------------  
function daysBetween(DateOne, DateTwo) {
	var OneMonth = DateOne.substring(5, DateOne.lastIndexOf('-'));
	var OneDay = DateOne.substring(DateOne.length, DateOne.lastIndexOf('-') + 1);
	var OneYear = DateOne.substring(0, DateOne.indexOf('-'));

	var TwoMonth = DateTwo.substring(5, DateTwo.lastIndexOf('-'));
	var TwoDay = DateTwo.substring(DateTwo.length, DateTwo.lastIndexOf('-') + 1);
	var TwoYear = DateTwo.substring(0, DateTwo.indexOf('-'));

	var cha = ((Date.parse(OneMonth + '/' + OneDay + '/' + OneYear) - Date.parse(TwoMonth + '/' + TwoDay + '/' + TwoYear)) /
		86400000);
	return Math.abs(cha);
}


//+---------------------------------------------------  
//| 日期计算  
//+---------------------------------------------------  
Date.prototype.DateAdd = function(strInterval, Number) {
	var dtTmp = this;
	switch (strInterval) {
		case 's':
			return new Date(Date.parse(dtTmp) + (1000 * Number));
		case 'n':
			return new Date(Date.parse(dtTmp) + (60000 * Number));
		case 'h':
			return new Date(Date.parse(dtTmp) + (3600000 * Number));
		case 'd':
			return new Date(Date.parse(dtTmp) + (86400000 * Number));
		case 'w':
			return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
		case 'q':
			return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(),
				dtTmp.getSeconds());
		case 'm':
			return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(),
				dtTmp.getSeconds());
		case 'y':
			return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(),
				dtTmp.getSeconds());
	}
}

//+---------------------------------------------------  
//| 比较日期差 dtEnd 格式为日期型或者有效日期格式字符串  
//+---------------------------------------------------  
Date.prototype.DateDiff = function(dtStart,dtEnd,strInterval) {
	
	if (typeof dtEnd == 'string') //如果是字符串转换为日期型  
	{
		dtEnd = StringToDate(dtEnd);
	}
	switch (strInterval) {
		case 's':
			return parseInt((dtEnd - dtStart) / 1000);
		case 'n':
			return parseInt((dtEnd - dtStart) / 60000);
		case 'h':
			return parseInt((dtEnd - dtStart) / 3600000);
		case 'd':
			return parseInt((dtEnd - dtStart) / 86400000);
		case 'w':
			return parseInt((dtEnd - dtStart) / (86400000 * 7));
		case 'm':
			return (dtEnd.getMonth() + 1) + ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12) - (dtStart.getMonth() + 1);
		case 'y':
			return dtEnd.getFullYear() - dtStart.getFullYear();
	}
}

//+---------------------------------------------------  
//| 日期输出字符串，重载了系统的toString方法  
//+---------------------------------------------------  
Date.prototype.toString = function(showWeek) {
	var myDate = this;
	var str = myDate.toLocaleDateString();
	if (showWeek) {
		var Week = ['日', '一', '二', '三', '四', '五', '六'];
		str += ' 星期' + Week[myDate.getDay()];
	}
	return str;
}

//+---------------------------------------------------  
//| 日期合法性验证  
//| 格式为：YYYY-MM-DD或YYYY/MM/DD  
//+---------------------------------------------------  
function IsValidDate(DateStr) {
	var sDate = DateStr.replace(/(^\s+|\s+$)/g, ''); //去两边空格;   
	if (sDate == '') return true;
	//如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''   
	//数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式   
	var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g, '');
	if (s == '') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D   
	{
		var t = new Date(sDate.replace(/\-/g, '/'));
		var ar = sDate.split(/[-/:]/);
		if (ar[0] != t.getYear() || ar[1] != t.getMonth() + 1 || ar[2] != t.getDate()) {
			//alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');   
			return false;
		}
	} else {
		//alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');   
		return false;
	}
	return true;
}

//+---------------------------------------------------  
//| 日期时间检查  
//| 格式为：YYYY-MM-DD HH:MM:SS  
//+---------------------------------------------------  
function CheckDateTime(str) {
	var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/;
	var r = str.match(reg);
	if (r == null) return false;
	r[2] = r[2] - 1;
	var d = new Date(r[1], r[2], r[3], r[4], r[5], r[6]);
	if (d.getFullYear() != r[1]) return false;
	if (d.getMonth() != r[2]) return false;
	if (d.getDate() != r[3]) return false;
	if (d.getHours() != r[4]) return false;
	if (d.getMinutes() != r[5]) return false;
	if (d.getSeconds() != r[6]) return false;
	return true;
}

//+---------------------------------------------------  
//| 把日期分割成数组  
//+---------------------------------------------------  
Date.prototype.toArray = function() {
	var myDate = this;
	var myArray = Array();
	myArray[0] = myDate.getFullYear();
	myArray[1] = myDate.getMonth();
	myArray[2] = myDate.getDate();
	myArray[3] = myDate.getHours();
	myArray[4] = myDate.getMinutes();
	myArray[5] = myDate.getSeconds();
	return myArray;
}

//+---------------------------------------------------  
//| 取得日期数据信息  
//| 参数 interval 表示数据类型  
//| y 年 m月 d日 w星期 ww周 h时 n分 s秒  
//+---------------------------------------------------  
Date.prototype.DatePart = function(interval) {
	var myDate = this;
	var partStr = '';
	var Week = ['日', '一', '二', '三', '四', '五', '六'];
	switch (interval) {
		case 'y':
			partStr = myDate.getFullYear();
			break;
		case 'm':
			partStr = myDate.getMonth() + 1;
			break;
		case 'd':
			partStr = myDate.getDate();
			break;
		case 'w':
			partStr = Week[myDate.getDay()];
			break;
		case 'ww':
			partStr = myDate.WeekNumOfYear();
			break;
		case 'h':
			partStr = myDate.getHours();
			break;
		case 'n':
			partStr = myDate.getMinutes();
			break;
		case 's':
			partStr = myDate.getSeconds();
			break;
	}
	return partStr;
}


// var da = new Date();



// da = da.Format('yyyy/MM/dd hh:mm:ss');
// module.exports = {
// 	dataHelper: da,
// }
